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Some Myths People normally think if they have created UI (ASP.Net application project), BL (.Net Class Library Project), & DAL data access layer (.Net Class Library Project) and referencing these projects in their web project, they are following 3 tier architecture. I think creating a n tier application is more than this. What is tier? According to me tier means a stand-alone process which has some code to process. In the above scenario where ASP.Net Web Application is referencing BL and DAL, all the code is running in w3wp (server OS)/ aspnet_wp process which is known as worker process. So in real terms all this is single tier. Then question arises that, is it 1 tier application? If you are not dealing with databases or any other thing which has its own process then yes it is 1-tier architecture. Database makes it 2-tier architecture. As all the databases are run under some process. sqlservr is the process for SQL databases. Some people also say that a web application will always

Client Storage for Silverlight Silverlight provides two classes, one is IsolatedStorage and another is DataContractSerializer . Silverlight provides IsolatedStorage class to store data at client machine. With isolated storage, data is always isolated by user and by assembly. Credentials such as the origin or the strong name of the assembly determine assembly identity. Data can also be isolated by application domain, using similar credentials. DataContractSerializer class, which is used to serialize and deserialize instances of a type into an XML stream or document. For example, you can create a type named Person with properties that contain essential data, such as a name and address. You can then create and manipulate an instance of the Person class and write all of its property values in an XML document for later retrieval, or in an XML stream for immediate transport. Most important, the DataContractSerializer is used to serialize and deserialize data sent in Silverlight version 2 m